I have permission from the District to remove two cherry trees on my boulevard so if someone can use the wood for their fireplace, I'm happy to give it to them.
But I put a price on the wood to ensure finding someone who can use a chainsaw without wrecking other plants nearby. So the $50 would be a bond to assure me of a careful job. If all the branches and mess get taken away with the wood, everything is free and the $50 is returned!